Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27a1e9dc6470adc85278acf1a213e0e266a14cd195866bac13bb8cb6bfc8a6a4' 
  AND token = 'kVUi+4HxRC9VqYBH+lrIHwj4ggIl1TKUMpCaODWRPiU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}